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कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

Assertion: Colloidal solutions do not show brownian motion. Reason: Brownian motion is responsible for stability of sols. - Chemistry

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प्रश्न

Assertion: Colloidal solutions do not show brownian motion.

Reason: Brownian motion is responsible for stability of sols.

पर्याय

  • Assertion and reason both are correct and the reason is correct explanation of assertion.

  • Assertion and reason both are correct but reason does not explain assertion.

  • Assertion is correct but reason is incorrect.

  • Both assertion and reason are incorrect.

  • Assertion is incorrect but reason is correct.

MCQ
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उत्तर

Assertion is incorrect but reason is correct.

Explanation:

Colloidal particle shows Brownian movement. The Brownian movement has a stirring effect which does not permit the particles to settle and thus, is responsible for the stability of sols.

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पाठ 5: Surface Chemistry - Exercises [पृष्ठ ७३]

APPEARS IN

एनसीईआरटी एक्झांप्लर Chemistry [English] Class 12
पाठ 5 Surface Chemistry
Exercises | Q 75 | पृष्ठ ७३

संबंधित प्रश्‍न

Define the following term:

Zeta potential


Give reasons for the following observations: Leather gets hardened after tanning.


Explain what is observed when a beam of light is passed through a colloidal sol.


Explain the terms Dialysis 


What happens when an emulsion is centrifuged?


Answer the following question.
Why are medicines more effective in the colloidal state?


Which of the following statements are correct?

(i) Mixing two oppositely charged sols neutralises their charges and stabilises the colloid.

(ii) Presence of equal and similar charges on colloidal particles provides stability to the colloids.

(iii) Any amount of dispersed liquid can be added to emulsion without destabilising it.

(iv) Brownian movement stabilises sols.


What happens when a lyophilic sol is added to a lyophobic sol?

(i) Lyophobic sol is protected.

(ii) Lyophilic sol is protected.

(iii) Film of lyophilic sol is formed over lyophobic sol.

(iv) Film of lyophobic sol is formed over lyophilic sol.


Which phenomenon occurs when an electric field is applied to a colloidal solution and electrophoresis is prevented?

(i) Reverse osmosis takes place.

(ii) Electroosmosis takes place.

(iii) Dispersion medium begins to move.

(iv) Dispersion medium becomes stationary.


Why do we add alum to purify water?


What causes brownian motion in colloidal dispersion?


Match the statement given in Column I with the phenomenon given in Column II.

Column I Column II
(i) Dispersion medium moves in an electric field (a) Osmosis
(ii) Solvent molecules pass through semi permeable
membrane towards solvent side
(b) Electrophoresis
(iii) Movement of charged colloidal particles under
the influence of applied electric potential towards
oppositely charged electrodes
(c) Electroosmosis
(iv) Solvent molecules pass through semi permeable
membranes towards solution side
(d) Reverse osmosis

Give reason for the following:

Lyophilic colloidal solutions are more stable than lyophobic colloidal solutions.


Tyndall effect is observed in


The important factor in the stabilization of a colloidal solution is ______


Define coagulation.


Why a negatively charged sol is obtained when AgNO3 solution is added to KI solution?


In order to cause coagulation of 100 ml Arsenious sulphide sol 111.7 mg of 2 M NaCl solution is used, the coagulation value of NaCl will be ______.


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